Ball marker



FIG. 1 is a top front perspective view showing my new design, the broken line showing of the ball marker in a secured position is for illustrative purposes only and forms no part of the claimed design;

FIG. 2 is a top rear perspective view thereof, the broken line ball marker exploded out for clarity if illustration;

FIG. 3 is a top plan view;

FIG. 4 is a bottom plan view of FIG. 3;

FIG. 5 is a rear elevational view of FIG. 3;

FIG. 6 is a front elevational view of FIG. 3;

FIG. 7 is a left side view of FIG. 3; and,

FIG. 8 is a right side view of FIG. 3. 

The ornamental design for a ball marker, as shown and described. 